import numpy as np

# 创建一个3x4的全零矩阵
zero_matrix = np.zeros((3, 4))

# 输出矩阵及其维度和行列数
print("矩阵：")
print(zero_matrix)
print("维度：", zero_matrix.ndim)
print("行数：", zero_matrix.shape[0])
print("列数：", zero_matrix.shape[1])
